Let x gallons be the amount of pure antifreeze that should be added to the 30% solution to produce a solution that is 65% antifreeze. Then the total amount of antifreeze solution will be x+3 gallons.
There are 30% of pure antifreeze in 3 gallons of solution, then
3 gallons - 100%,
a gallons - 30%,
where a gallons is the amount of pure antifreeze in given solution.
Mathematically,
Now in new solution there will be x+0.9 gallons of pure antefreeze.
x+3 gallons - 100%,
x+0.9 - 65%
or
Answer: he should add 3 gallons of pure antifreeze.
An exterior angle is the sum of the two other interior angles
<span>the three interior angles are 55 and 65 and 180-(55+65)=60 </span>
<span>so 60 + 55 = 115 </span>
<span>60 + 65 = 125 </span>
<span>65 + 55 = 120
</span>
brainlest answer.
Answer:
y=2x-7
Step-by-step explanation:
so here's my work
I just plugged stuff in so:
y+1=2(x-3)
y+1=2x-6
y=2x-7
Answer:
299 miles per hour
Step-by-step explanation:
![v=\frac{234}{\sqrt[3]{\frac{p}{w}}}](https://tex.z-dn.net/?f=v%3D%5Cfrac%7B234%7D%7B%5Csqrt%5B3%5D%7B%5Cfrac%7Bp%7D%7Bw%7D%7D%7D)
![v=\frac{234}{\sqrt[3]{\frac{1311}{2744}}}](https://tex.z-dn.net/?f=v%3D%5Cfrac%7B234%7D%7B%5Csqrt%5B3%5D%7B%5Cfrac%7B1311%7D%7B2744%7D%7D%7D)
Therefore, the velocity of the car at the end of a drag race is 299 miles per hour
Answer:
Step-by-step explanation:
Direction: Opens Up
Vertex:
(
3
,
−
4
)
Focus:
(
3
,
−
15
4
)
Axis of Symmetry:
x
=
3
Directrix:
y
=
−
17
4
Select a few
x
values, and plug them into the equation to find the corresponding
y
values. The
x
values should be selected around the vertex.
Tap for more steps...
x
y
1
0
2
−
3
3
−
4
4
−
3
5
0
Graph the parabola using its properties and the selected points.
Direction: Opens Up
Vertex:
(
3
,
−
4
)
Focus:
(
3
,
−
15
4
)
Axis of Symmetry:
x
=
3
Directrix:
y
=
−
17
4
x
y
1
0
2
−
3
3
−
4
4
−
3
5
0
